On the Spectral Efficiency of Selective Decode-and-Forward Relaying
Multirelay cooperative relaying enables spatial diversity, often at the expense of spectral efficiency. To alleviate the loss in spectral efficiency due to half-duplex relaying and transmission over orthogonal channels, the authors propose a novel transmission scheme for selective decode-and-forward (DF) networks. In this scheme, the authors assume that destination may receive signals from transmitting nodes with different modulation levels. Particularly, the authors obtain a closed-form expression for both end-to-end (E2E) average error probability and spectral efficiency in such a scheme. Subsequently, using these closed-form expressions and average channel statistics, the authors perform joint optimization of power allocation and modulation level selection to maximize the E2E spectral efficiency while maintaining a target E2E average error probability and a set of transmit power constraints. Simulation results demonstrate that the transmission scheme proposed herein improves the E2E spectral efficiency significantly, in comparison with the conventional adaptive DF transmission scheme.
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Availability:
- Find a library where document is available. Order URL: http://worldcat.org/issn/00189545
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Supplemental Notes:
- Copyright © 2017, IEEE.
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Authors:
- Sokun, Hamza Umit
- Yanikomeroglu, Halim
- Publication Date: 2017-5
Language
- English
Media Info
- Media Type: Web
- Features: Figures; References;
- Pagination: pp 4500-4506
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Serial:
- IEEE Transactions on Vehicular Technology
- Volume: 66
- Issue Number: 5
- Publisher: Institute of Electrical and Electronics Engineers (IEEE)
- ISSN: 0018-9545
- Serial URL: http://ieeexplore.ieee.org/xpl/mostRecentIssue.jsp?punumber=25
Subject/Index Terms
- TRT Terms: Modulation (Communications); Optimization; Probability; Radio relay systems; Radio wave propagation; Resource allocation; Transmission errors and interference; Transmission loss; Wireless communication systems
- Subject Areas: Data and Information Technology; Transportation (General);
Filing Info
- Accession Number: 01638448
- Record Type: Publication
- Files: TRIS
- Created Date: Jun 23 2017 11:40AM